Even sized map. The map on the left should pan regularly, and the two centers below should be equivalent. Both dragging and panning with buttons should maintain the same center.

pixel center:
map center:
equvalent:

Odd sized map. The map on the left should pan regularly, and the two centers below should be equivalent. Both dragging and panning with buttons should maintain the same center.

pixel center:
map center:
equvalent: